This white wooden cornice is just what this dark purple wall needs to brighten it up. I love the fact that the cornice matches the white wood on the door. The light to dark contrast from the wal to the cornice adds depth and interest to this room.
Make your baseboard more dramatic...add small pieces of trim to the top of existing baseboard, add a few inches and add another piece of molding. Paint the wall and trim white. This also works for crown molding too!